Link.setSharedGroup()

Engines, Libraries and Tools Xith3D Forums
#1

Link.setSharedGroup() doesn’t work properly, when rendering it throws a NullPointerException on the RenderBinProvider of the Shape3Ds contained in the Shared group.

The workaround I use is :


removeChild(link);
link.setSharedGroup(group);
addChild(link);

though it’s not particularly elegant.

Marvin, how can we fix that ?

#2

I’m not at home at the moment. I’ll investigate it later. But does this happen in ShaderGroupTest?

Marvin

#3

I don’t know I’ll investigate it tomorrow.

#4

I checked that. SharedGroupTest works properly. Please check, if it does for you. If it does, please provide me an example where it doesn’t (or modify SharedGroupTest).

Marvin

#5

Hi,

Several things done at once :

  • The Cal3D loader has now a test, with a bowman model from the game project I’m working on (I got special permissions from my art team).
  • In PrecomputedAnimatedModel.java line 115 you can see the workaround I talked about shared groups

            // FIXME : hackish
            this.removeChild(link); // COMMENT THESE LINES TO SEE THE BUG
            link.setSharedGroup(group);
            this.addChild(link); // COMMENT THESE LINES TO SEE THE BUG
  • in CalTest.java you can see how the “Transform” class is used… really, really neat.
  • light bug in CalTest : lighting is correctly rendered on the first frame, then it’s no longer active.

When all that’s fixed, that will be fine.

#6

I’ll have a look.

#7

Fixed.
Look at this place in the code. I’ve added a comment.

Fixed.
But the lighting is not rendered very nicely. But I believe this is due to the angularity of the model and not due to the engine.

Marvin

#8

Surely, but, you know, it’s a bit hard to adjust lighting when it actually doesn’t work… ;D

Thanks for all, Marvin!

#9

True… true :stuck_out_tongue:

#10

Huh, it seems the lighting problem isn’t entirely gone… or I miss something here… Does it work for you Marvin ?

Also the LWJGL renderer doesn’t work on my computer :


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No field: KEY_ENTER
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No field: KEY_GEST_KEY_CODE
java.lang.NullPointerException
	at org.lwjgl.opengl.GL11.glGetInteger(GL11.java:1217)
	at org.xith3d.render.lwjgl.CanvasPeerImpl.renderStart(CanvasPeerImpl.java:624)
	at org.xith3d.render.lwjgl.CanvasPeerImpl.display(CanvasPeerImpl.java:960)
	at org.xith3d.render.lwjgl.CanvasPeerImpl.render(CanvasPeerImpl.java:1061)
	at org.xith3d.render.Renderer.renderOnce(Renderer.java:489)
	at org.xith3d.scenegraph.VirtualUniverse.renderOnce(VirtualUniverse.java:131)
	at org.xith3d.render.base.ExtXith3DEnvironment.render(ExtXith3DEnvironment.java:242)
	at org.xith3d.render.loop.RenderLoop.invokeRendering(RenderLoop.java:670)
	at org.xith3d.render.loop.RenderLoop.loopIteration(RenderLoop.java:686)
	at org.xith3d.render.loop.ExtRenderLoop.loopIteration(ExtRenderLoop.java:308)
	at org.xith3d.test.loaders.Cal3DLoaderTest.loopIteration(Cal3DLoaderTest.java:115)
	at org.xith3d.render.loop.RenderLoop.run(RenderLoop.java:812)
	at java.lang.Thread.run(Thread.java:595)
Exception in thread "Thread-4" java.lang.Error: java.lang.NullPointerException
	at org.xith3d.render.lwjgl.CanvasPeerImpl.display(CanvasPeerImpl.java:1024)
	at org.xith3d.render.lwjgl.CanvasPeerImpl.render(CanvasPeerImpl.java:1061)
	at org.xith3d.render.Renderer.renderOnce(Renderer.java:489)
	at org.xith3d.scenegraph.VirtualUniverse.renderOnce(VirtualUniverse.java:131)
	at org.xith3d.render.base.ExtXith3DEnvironment.render(ExtXith3DEnvironment.java:242)
	at org.xith3d.render.loop.RenderLoop.invokeRendering(RenderLoop.java:670)
	at org.xith3d.render.loop.RenderLoop.loopIteration(RenderLoop.java:686)
	at org.xith3d.render.loop.ExtRenderLoop.loopIteration(ExtRenderLoop.java:308)
	at org.xith3d.test.loaders.Cal3DLoaderTest.loopIteration(Cal3DLoaderTest.java:115)
	at org.xith3d.render.loop.RenderLoop.run(RenderLoop.java:812)
	at java.lang.Thread.run(Thread.java:595)
Caused by: java.lang.NullPointerException
	at org.lwjgl.opengl.GL11.glGetInteger(GL11.java:1217)
	at org.xith3d.render.lwjgl.CanvasPeerImpl.renderStart(CanvasPeerImpl.java:624)
	at org.xith3d.render.lwjgl.CanvasPeerImpl.display(CanvasPeerImpl.java:960)
	... 10 more

I’m also investigating how shadows work.

#11

It did. But for some reason, it doesn’t anymore. I’ll investigate it.

This error appears in some situations (reproducably). But I don’t have an idea why. I have never seen the LWJGL renderer without this problem. Maybe Yuri has an answer on it, when he’s back. Or we’ll have to deeper investigate it.

Good to know. I think, you’ll have to add an Occluder to a Shape3D, which can e.g. be a quadrat. In general it is a simplified version of the shape’s bounds. Together with lights this should be sufficient to get it working. But I never tried.

Marvin

#12

I get some strange effects with shadow rendering on.

Also, texture rendering has gone… gosh regular users don’t checkout now ^^

#13

The problem with lights is fixed :).

Is there an example, where I can see the effect?

Marvin

#14

Well the Cal3DLoaderTest don’t work with textures for me now. (Note : maybe it’s not committed properly cause I upgraded my Eclipse from 3.2 to 3.3M3 and my Subclipse SVN plugin is gone so tomorrow it’ll be fixed hopefully)